Sure did. The scene between Fox, Tate, and Blake where he states that the bomb goes off in 23 days happens before Bruce escapes the Pit. When he finally reveals himself to Selina, he says the bomb goes off "tomorrow". When he finally meets up with Fox, Fox says the bomb goes off in 12 hours.

So, yeah, it took him 22 days to reveal himself. Granted, maybe he chilled at Wayne Manor for a few days to get himself squared away and whatnot but who knows....(sarcasm).

Yeah. I think the idea is that he got all his ducks in a row before revealing himself. Setup the signal for Gordon, the bridge signal, amended his will, fixed the autopilot, etc.